Nissan Almera Tino V10 (2001 year). Manual — part 89
SEF611Y
SEF068X
EGR TEMPERATURE SENSOR
NLEC1826S07
Check resistance change and resistance value.
<Reference data>
EGR temperature
°C (°F)
Voltage
V
Resistance
M
Ω
0 (32)
4.56
0.73 - 0.89
50 (122)
2.25
0.074 - 0.082
100 (212)
0.59
0.012 - 0.014
If NG, replace EGR temperature sensor.
EGR VOLUME CONTROL SYSTEM (WHERE FITTED)
SR20DE
Component Inspection (Cont’d)
EC-985
Description
NLEC1827
SYSTEM DESCRIPTION
NLEC1827S01
Sensor
Input Signal to ECM
ECM func-
tion
Actuator
Camshaft position sensor
Engine speed
EVAP can-
ister purge
control
EVAP canister purge volume
control solenoid valve
Mass air flow sensor
Amount of intake air
Engine coolant temperature sensor
Engine coolant temperature
Battery
Battery voltage
Ignition switch
Start signal
Closed throttle position switch
Closed throttle position
Throttle position sensor
Throttle position
Heated oxygen sensor 1 (front)
Density of oxygen in exhaust gas
(Mixture ratio feedback signal)
Fuel tank temperature sensor
Fuel temperature in fuel tank
Vehicle speed sensor
Vehicle speed
This system controls flow rate of fuel vapor from the EVAP canis-
ter. The opening of the vapor by-pass passage in the EVAP canis-
ter purge volume control solenoid valve changes to control the flow
rate. The EVAP canister purge volume control solenoid valve
repeats ON/OFF operation according to the signal sent from the
ECM. The opening of the valve varies for optimum engine control.
The optimum value stored in the ECM is determined by consider-
ing various engine conditions. When the engine is operating, the
flow rate of fuel vapor from the EVAP canister is regulated as the
air flow changes.
SEF337U
COMPONENT DESCRIPTION
NLEC1827S02
The EVAP canister purge volume control solenoid valve uses a
ON/OFF duty to control the flow rate of fuel vapor from the EVAP
canister. The EVAP canister purge volume control solenoid valve
is moved by ON/OFF pulses from the ECM. The longer the ON
pulse, the greater the amount of fuel vapor that will flow through the
valve.
CONSULT-II Reference Value in Data Monitor
Mode
NLEC1828
MONITOR ITEM
CONDITION
SPECIFICATION
PURG VOL C/V
+
Engine: After warming up
+
No-load
Idle
0%
Revving engine
—
EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
SR20DE
Description
EC-986
ECM Terminals and Reference Value
=NLEC1829
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM’s transistor. Use a ground other than ECM terminals, such as the ground.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
14
P
EVAP canister purge vol-
ume control solenoid valve
[Engine is running]
+
Warm-up condition
+
Idle speed
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
+
Warm-up condition
+
2,000 rpm
5 - 12V
SEF975W
EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
SR20DE
ECM Terminals and Reference Value
EC-987
Wiring Diagram
NLEC1832
MODELS WITH ECM IN ENGINE COMPARTMENT
NLEC1832S01
YEC758
EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
SR20DE
Wiring Diagram
EC-988
MODELS WITH ECM IN CABIN
NLEC1832S02
YEC936
EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
SR20DE
Wiring Diagram (Cont’d)
EC-989
Diagnostic Procedure
NLEC1835
1
INSPECTION START
Do you have CONSULT-II?
Yes or No
Yes
©
GO TO 2.
No
©
GO TO 3.
2
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE CONTROL FUNCTION
With CONSULT-II
1. Turn ignition switch “OFF”.
2. Disconnect the EVAP purge hose connected to the EVAP canister purge volume control solenoid valve at the EVAP
canister.
3. Turn ignition switch “ON” and select “PURG VOL CONT/V” in “ACTIVE TEST” mode with CONSULT-II.
4. Start engine and let it idle.
5. Change the valve opening percentage touching “Qu” and “Qd” and check for vacuum existence under the following
conditions.
SEF789Z
OK or NG
OK
©
GO TO 4.
NG
©
GO TO 5.
EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
SR20DE
Diagnostic Procedure
EC-990
3
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE CONTROL FUNCTION
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch “OFF”.
3. Disconnect the EVAP purge hose connected to the EVAP canister purge volume control solenoid valve at the EVAP
canister.
4. Start engine and let it idle for at least 100 seconds.
5. Check for vacuum existence at the EVAP purge hose under the following conditions.
SEF790Z
OK or NG
OK
©
GO TO 4.
NG
©
GO TO 5.
4
CHECK EVAP CANISTER
1. Turn ignition switch “OFF”.
2. Remove EVAP canister.
3. Block port B of EVAP canister.
4. Blow air through port A orally, and confirm that air flows freely through port C with check valve resistance.
5. Block port A of EVAP canister.
6. Blow air through port B orally, and confirm that air flows freely through port C.
SEF917W
OK or NG
OK
©
INSPECTION END
NG
©
Replace EVAP canister.
EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
SR20DE
Diagnostic Procedure (Cont’d)
EC-991
5
CHECK VACUUM HOSES AND TUBES
1. Turn ignition switch “OFF”.
2. Disconnect vacuum hoses between the EVAP canister purge volume control solenoid valve and vacuum port, EVAP
canister purge volume control solenoid valve and EVAP canister.
3. Check hoses and tubes for cracks, clogging, improper connection or disconnection.
SEF109L
OK or NG
OK
©
GO TO 6.
NG
©
Repair hoses or tubes.
6
CHECK VACUUM PORT
1. Disconnect the vacuum hose connected to the EVAP canister purge volume control solenoid valve at the vacuum port.
2. Blow air into vacuum port.
3. Check that air flows freely.
OK or NG
OK
©
GO TO 7.
NG
©
Repair or clean vacuum port.
EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
SR20DE
Diagnostic Procedure (Cont’d)
EC-992
7
CHECK POWER SUPPLY
1. Turn ignition switch “OFF”.
2. Disconnect EVAP canister purge volume control solenoid valve harness connector.
SEF219X
3. Turn ignition switch “ON”.
4. Check voltage between EVAP canister purge volume control solenoid valve terminal 2 and engine ground with CON-
SULT-II or tester.
SEF333X
OK or NG
OK
©
GO TO 9.
NG
©
GO TO 8.
8
DETECT MALFUNCTIONING PART
Check the following.
+
Harness connectors E75, F35 (where fitted)
+
Harness connectors M72, F44 (where fitted)
+
Harness connectors F13, F60
+
10A fuse
+
Harness for open or short between EVAP canister purge volume control solenoid valve and fuse
©
Repair harness or connectors.
9
CHECK OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 14 and EVAP canister purge volume control solenoid valve terminal 1.
Refer to wiring diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 11.
NG
©
GO TO 10.
EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
SR20DE
Diagnostic Procedure (Cont’d)
EC-993
10
DETECT MALFUNCTIONING PART
Check the following.
+
Harness connectors F60, F13
+
Harness for open or short between EVAP canister purge volume control solenoid valve and ECM.
©
Repair copen circuit or short to ground or short to power in harness or connectors.
11
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Refer to “Component Inspection” EC-994.
OK or NG
OK
©
GO TO 12.
NG
©
Replace EVAP canister purge volume control solenoid valve.
12
CHECK INTERMITTENT INCIDENT
Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-670.
©
INSPECTION END
SEF801Y
SEF661U
Component Inspection
NLEC1834
EVAP CANISTER PURGE VOLUME CONTROL
SOLENOID VALVE
NLEC1834S01
With CONSULT-II
1)
Start engine.
2)
Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with
CONSULT-II. Check that engine speed varies according to the
valve opening.
If OK, inspection end. If NG, go to following step.
3)
Check air passage continuity.
Condition
PURG VOL CONT/V value
Air passage continuity
between A and B
100.0%
Yes
0.0%
No
If NG or operation takes more than 1 second, replace the
EVAP canister purge volume control solenoid valve.
Without CONSULT-II
Check air passage continuity.
Condition
Air passage continuity
between A and B
12V direct current supply between ter-
minals
Yes
No supply
No
If NG or operation takes more than 1 second, replace the EVAP
canister purge volume control solenoid valve.
EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
SR20DE
Diagnostic Procedure (Cont’d)
EC-994
Description
NLEC1836
SYSTEM DESCRIPTION
NLEC1836S01
Sensor
Input Signal to ECM
ECM func-
tion
Actuator
Camshaft position sensor
Engine speed
Idle air
control
IACV-AAC valve
Mass air flow sensor
Amount of intake air
Engine coolant temperature sensor
Engine coolant temperature
Ignition switch
Start signal
Throttle position sensor
Throttle position
Park/neutral position (PNP) switch
Park/neutral position
Air conditioner switch
Air conditioner operation
Power steering oil pressure switch
Power steering load signal
Battery
Battery voltage
Vehicle speed sensor
Vehicle speed
Intake air temperature sensor
Intake air temperature
Cooling fan
Cooling fan operation
Electrical load
Electrical load signal
This system automatically controls engine idle speed to a specified
level. Idle speed is controlled through fine adjustment of the
amount of air which by-passes the throttle valve via IACV-AAC
valve. The IACV-AAC valve changes the opening of the air by-pass
passage to control the amount of auxiliary air. This valve is actu-
ated by a step motor built into the valve, which moves the valve in
the axial direction in steps corresponding to the ECM output sig-
nals. One step of IACV-AAC valve movement causes the respec-
tive opening of the air by-pass passage. (i.e. when the step
advances, the opening is enlarged.) The opening of the valve is
varied to allow for optimum control of the engine idling speed. The
camshaft position sensor detects the actual engine speed and
sends a signal to the ECM. The ECM then controls the step posi-
tion of the IACV-AAC valve so that engine speed coincides with the
target value memorized in ECM. The target engine speed is the
lowest speed at which the engine can operate steadily. The opti-
mum value stored in the ECM is determined by takig into consid-
eration various engine conditions, such as during warm up,
deceleration, and engine load (air conditioner, power steering and
cooling fan operation).
SEF937W
COMPONENT DESCRIPTION
NLEC1836S02
IACV-AAC Valve
NLEC1836S0201
The IACV-AAC valve is operated by a step motor for centralized
control of auxiliary air supply. This motor has four winding phases
and is actuated by the output signals of ECM which turns ON and
OFF two windings each in seqeunce. Each time the IACV-AAC
valve opens or closes to change tha auxiliary air quantity, the ECM
sends a pulse signal to the step motor. When no change in the
auxiliary air quantity is needed, the ECM does not issue the pulse
signal. A certain voltage signal is issued so that the valve remains
at that particular opening.
IDLE AIR CONTROL VALVE (IACV) —
AUXILIARY AIR CONTROL (AAC) VALVE
SR20DE
Description
EC-995
CONSULT-II Reference Value in Data Monitor
Mode
NLEC1837
MONITOR ITEM
CONDITION
SPECIFICATION
IACV-AAC/V
+
Engine: After warming up
+
Air conditioner switch: OFF
+
Shift lever: “N”
+
No-load
Idle
5 - 20 steps
2,000 rpm
—
ECM Terminals and Reference Value
NLEC1838
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM’s transistor. Use a ground other than ECM terminals, such as the ground.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
6
7
15
16
BR
LG
GY/L
OR
IACV-AAC valve
[Engine is running]
+
Warm-up condition
+
Idle speed
0.1 - 14V
IDLE AIR CONTROL VALVE (IACV) —
AUXILIARY AIR CONTROL (AAC) VALVE
SR20DE
CONSULT-II Reference Value in Data Monitor Mode
EC-996
Wiring Diagram
NLEC1841
MODELS WITH ECM IN ENGINE COMPARTMENT
NLEC1841S01
YEC759
IDLE AIR CONTROL VALVE (IACV) —
AUXILIARY AIR CONTROL (AAC) VALVE
SR20DE
Wiring Diagram
EC-997
MODELS WITH ECM IN CABIN
NLEC1841S02
YEC937
IDLE AIR CONTROL VALVE (IACV) —
AUXILIARY AIR CONTROL (AAC) VALVE
SR20DE
Wiring Diagram (Cont’d)
EC-998
Diagnostic Procedure
NLEC1842
1
CHECK OVERALL FUNCTION
1. Turn ignition switch “OFF”.
2. Read the voltage signal between ECM terminals 6, 7, 15, 16 (IACV-AAC valve signal) and ground with an oscilloscope.
3. Turn ignition switch “ON”, wait at least 5 seconds and then “OFF”.
4. Verify that the oscilloscope screen shows the signal wave as shown below at least once every 10 seconds after turning
ignition switch “OFF”.
SEF756Z
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 2.
2
CHECK POWER SUPPLY
1. Turn ignition switch “OFF”.
2. Disconnect IACV-AAC valve harness connector.
SEF221X
3. Turn ignition switch “ON”.
4. Check voltage between terminal 2, 5 and ground with CONSULT-II or tester.
SEF343X
OK or NG
OK
©
GO TO 4.
NG
©
GO TO 3.
IDLE AIR CONTROL VALVE (IACV) —
AUXILIARY AIR CONTROL (AAC) VALVE
SR20DE
Diagnostic Procedure
EC-999
3
DETECT MALFUNCTIONING PART
Check the following.
+
15A fuse
+
Harness connectors E76, F36
+
Harness for open or short between fuse and ECM relay
+
ECM relay
+
Harness for open or short between IACV-AAC and ECM relay
©
Repair harness or connectors or replace fuse or ECM relay.
4
CHECK OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between
ECM terminal 6 and IACV-AAC valve terminal 1,
ECM terminal 7 and IACV-AAC valve terminal 4,
ECM terminal 15 and IACV-AAC valve terminal 3,
ECM terminal 16 and IACV-AAC valve terminal 6.
Refer to wiring diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 5.
NG
©
Repair open circuit or short to ground or short to power in harness or connectors.
5
CHECK AIR CONTROL VALVE (POWER STEERING) OPERATION-I
1. Reconnect the ECM harness connector and IACV-AAC valve harness connector.
2. Disconnect the vacuum hose connected to the air control valve (Power steering) at intake air duct.
3. Start engine and let it idle.
4. Check vacuum hose for vacuum existence.
SEF778Z
Vacuum does not exist or slightly exist.
OK or NG
OK
©
GO TO 6.
NG
©
Replace air control valve (Power steering).
IDLE AIR CONTROL VALVE (IACV) —
AUXILIARY AIR CONTROL (AAC) VALVE
SR20DE
Diagnostic Procedure (Cont’d)
EC-1000
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